A light emitting apparatus comprises a light emitting section for emitting light, a color of the light being changed with a value of a driving current, and a driving section for driving the light emitting section so that the light emitting section emits light having a desired color and a desired intensity, by generating the driving current based on a signal designating the desired color and a signal designating the desired intensity and by applying the driving current to the light emitting section.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A LED light emitting apparatus, comprising a plurality of LED devices which are located in a plane, of which the colors of the emitting light and the emission densities are independently varied, wherein each of the LED devices includes a fluorescent, the color of the emitting light of the LED device is adapted to have a blueshift according to a value of the driving current thereof, the LED device comprises a nitride semiconductor, and wherein in order to drive the LED device, a pulse current is loaded onto the LED device so that the peak value and the Duty ratio of the pulse current are separately controlled, and wherein the pulse current has a period equal to or less than 30 ms and a pulse width equal to or larger than 0.2 ns.
2. A LED light emitting apparatus comprising a plurality of LED devices which are located in a plane, and of which the colors of the emitting light are independently varied, wherein the color of the light of the LED device is adapted to have a blueshift according to a value of the driving current thereof, the LED device comprises a nitride semiconductor, and the LED device includes an active layer comprising InGaN, and wherein in order to drive the LED device, a pulse current is loaded onto the LED device so that the peak value and the Duty ratio of the pulse current are separately controlled, and wherein the pulse current has a period equal to or less than 30 ms and a pulse width equal to or larger than 0.2 ns.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
January 10, 2011
August 21, 2012
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